Carriage arrangement for sand-blast apparatus



Ma'y 101.1927. 1,628,311

H. F. HOEVEL CARRIAGE ARBANGEMENT FOR SAND'BLAST APPARATUS vFiled Dec. 24- 1921 2 Sheets-Sheetl Hf-E- 'A TTOHNE V5 Patented May 10, 1927.

UNITED STATES HERMAN F. HQEVEL, OF NEW YORK, N. Y.

CARRIAGE ARRANGEMENT FOR SAND-BLAST APPARATUS.

Application filed December 24', 1921'.

This invention relates to apparatus for Sandblasting o-r otherwise spraying large objects such as lathe beds, cylinders. automobile bodies and' the like, and it is the obl ject of this invention to devise apparatus of this kind Which can be operated with a high degree of' efliciency, while at the same time protecting the operator against the injurious effects of sand and dust.

To accomplish this result,-'it has been tried to placeV the' operato-r outside the chamber or house in which the cleaning was done, and to have him operate thel nozzle through slots or openings in the Wall of the chamber. This greatly reduced h-is freedom of action, making it diflicult or impossible for him to clean parts of irregular shape. It has also been attempted to place the operator in a cage or carriage which could be pushed by an attendant toward or from the work to be treated, and in which the Workman directing the nozzle would be protected against dust and sand. This arrangement had-the drawback that the carriage had tobe moved by the operator o-r by asecond attendant, thus causing considerable loss of time.

According to the forms of my invention shown herein, I provide a cage' or carriage which is run in or out ofA the cleaning house, 30 that'is, toward vand from the- 'Work toA be treated, automatically, as the Work moves during operation, so that the operator is always at approximately the same dista-nce from the particular surface to be olea-ucd or treated, but it will be understood that l dio not restrict myself to these special ari-angements.

The objects and advantages of my present invention Will appear fully from the d'cscription followingr hereinafter and the novelty will be pointed out in the appended claims.

In the accompanying drawings T have illustrated preferredI and satisfactory .examples of my invention. In these dra,v rings,

Fig. l is a vertical section through an apparatus embodying one form of my invention, said sectionbeing` taken substantially on line l-l o-f Fig. 2;

Fig. 2 is a plian view of the apparatus shown in Fig. l, With parts in section;

Fig. y3 is a plan View of an apparatus embodying another form of my invention; and

Fig. 4 illustrates a device for operating Serial N0. 524,626.

the nozzle automatically instead of by hand as shown in Fig. l. y

Referring now first to the forml of my inventionillustrated by Figs. l and l() represents a chamber or housing having on one side an opening ll normallyY closed by a cage or carriage l2 movable in a preferably straight in-and-out direction on Wheels travelling on a track 14. Inside the chamber l() is arranged for rotation on rollers l5, a turntable 16 serving as a support for a. casting or other object 17 to be treated, which latter may, for convenience in han` dlin-g, be mounted on a truck 18. The turntable 1G may be rotated in any suitable manner, for instance by bevel gearing l!) driven from a motor or other'source of power (not shown).

To the lower surface of the turntable 16 is secured a cam track 20 which conforms substantially to the outline of the article to be treated r(see Fig. 2).v In this cam. track, at its point nearest to the carriage l2, is located a. rol-ler 2l journalled at one end of a'. rod 22 the other end of which is secured rigidly to the Vbottom of the carriage 12. The rod 2Q may be guided in its movement parallel to the track ll, by a stationary guide 23. Y V

Into the carriage l2 leads a flexible sandblast conduit 24. with which is connected, inside of the carriage, a .pipe 25 having preferably .flexible portion and projecting to the outsideof the carriage through a suitable opening orslot 26 in the wall of the carriage facing the inside of Vthe `chamber 1'0". .At its free end the pipe is provided with a nozzle 27 which may be held in operative position to the Work to. be treated, by an operator standing Within the carriage l2'. The flexible pipe portion within. the carriage l2 allows .the operator a. certain amount of freedom insivinging the nozzle 27 with respect tothe Work on the turntable, Whilethe fieXible connection Q4; permits of a. reciprocating movement of the carriage..Y The operator may watch the operation of the device through a Window '28, andv the slot or opening 2G may bc covered by a rubber curtain 9.9,. as anV additional protection of the operator against sand and dust.. l

In order'to increase the efticiencyv of the apparatus, it may be desirableto. arrange, in conjunction with one and the; same chamfifi lill) 'riti 

